What are the plans for the lower? Precision build, SBR, or just basic 16" shooter.

Definitely not a dedicated precision build. An 18/20" 5.56 is a ways down the road. My first precision rifle will be a .308 OBR or something comparable. I thought about registering the lower as an SBR but didn't really feel like waiting. So, I guess I'm kind of going middle of the road with a 16" LaRue Stealth Upper.